Necticut



v(N0 Model.)

J. E. BARNES au J. H. WooLAsToN.

NIGHT LATCH.

16.346,704. Patentedmgs. 1886."

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Nirn rmns JOHN H. BARNES AND JOSEPH H. WOOLASTON, OE NEV HAVEN, rCON- NEOTIOUT, ASSIGNORS TO THE BARNES MANUFACTURING COMPANY,

OF SAME PLACE.

NlGHT-LATCi-l.

SPECIFICATION forming part o1' Letters Patent No. 346,704, dated August 3. 1886.

Application filed June 1, 1886. Serial No. 203,745. (No model.)

To all whom, it may concern:

Be it known that we, JOHN H. BARNES and Josnrn H. WooLAs'roN, of N ew Haven, in the county of New Haven and State of Connecticut, have invented a new Improvement in Night- Latehes, and we dohereby declare the following, when taken in connection with accompanying drawings and the letters of reference marked thereon, to be a full, clear, vand exact description of the same, and which said drawings constitute part of this specification, and represent, in-

Figure l, a key-hole side view of the latch, with the cylinder set for one hand; Eig. 2, same view as Fig. l, inverted, and the cylinder set for the reverse hand; Fig. 3, an inside view of the covering-plate; Fig. 4, a transverse view showing side View of the cylinder.

rihis invention relates to an improvement in that class of latches known as night-latchesU-that is, latches which are arranged to be operated by a knob on one side of the door and by a key from the opposite side, or in latches which are operated by akey from one side only, and particularly for latches to be operated by a dat spindle-key, which requires a cylinder to support the key, the said cylinder having a radial slot corresponding in position to the hole in the case for the bit of the key, the two forming the complete key-hole. In the usual construction of this class of latches, if the bolt is arranged fora right-hand door, and it is desired to apply the latch to a left-hand door, or the reverse, the key-hole must necessarily be inverted.

The object of this invention is to construct a latch of this character so that the same latch is adapted for either a right or left hand door, andit consists in constructing the case with two slots substantially in line with each other, and each corresponding to the bit of the same key, and distant from each other the diameter of the cylinder, andy arranging the cylinder having a slot in one side for the spindle of the key between the two key-holes,'and so that it may be revolved to bring the slot in the cylinder to open into either of the key-holes in the plate, and form 4a complete key-hole in either position.

The drawings show only so much oi'alateh 5o as is necessary to illustrate the invention.

A represents the case, which may be of any desired form.

B is the removable plate, constructed with an opening for the cylinder, from which slots a b extend, the one above and the other below the cylinder opening, each of said slots corresponding to and forming the hole for the bit of the key.

O is the cylinder, of substantially the usual 6o shape, one end corresponding in size to the size of the opening in the plate,.so as to take a bearing and be freely rotated therein, and is constructedwith the usual radial slot, d, to receive the spindle ofthe key and formthe een- 6 5 ter upon which the key may be turned. The sides of the cylinder inside the plate are cut away, forming two opposite parallel sides, as shown in broken lines, Eig. 3.

D is a spring, arranged upon a post, e, on 7o the inside of the plate, one arm taking a bearing upon a stud, f, on the plate, and the other arm extending across one side of the cylinder, so as to hold the eylinderin such position that the slot d will open into one of the holes b in the plate, as seen in Fig. l, adapting the latch for doors of one hand, but yield to allow the cylinder to be turned by the key in drawing the bolt, and also that the cylinder may be turned to bring the slot d to the other hole, a, 8o in the plate, as seen in Fig. 2, for the other hand, and so that the latch may be used for doors of either right or left hand, and operated by placing the key into the latch bit downward.

If desired, the spring may be arranged in the case to bear against the inner end of the cylinder, as shown in broken lines, Fig. 4, but it is preferable to arrange it upon the plate,

as hereinbefore described, as the spring forms 9c y a frictional connection between the cylinder and the plate, so that in assembling the parts or in removing the plate the cylinder is held in position in relation to the plate, and is not liable to be accidentally displaced. g5

rllhe arrangement'of the spring on the covering-plate to support the cylinder may be employed in this class of locks with a single key-hole, -or non-reversible. We therefore do not wish to be understood as limiting this part of our invention to the presence of the two keyholes. It will also be understood that the cylinder with the single slot andthe two key-holes extending radially from the cylinder-opening is substantially as Well adapted to other mechanism Within the case as to that which we have illustrated.

We claim- 1. In alatch substantially such as described, the combination of the case A, provided with a removable plate, B, said plate constructed with an opening, from the upper and lower sides of which a hole, a b, extends, each hole corresponding to the bit of the key, a cylinder, C, arranged in said opening between said keyholes, and constructed with a radial slot, d, upon one side, said cylinder adapted to be rotated so as to present the said slot to either of the said holes in the plate, thereby forming a ot' the key, and the cylinder adapted to be rotated so as to present the said slot to the said key-hole to receive the key, and a spring fixed upon the removable plate and arranged to b ear upon and yieldingly hold the cylinder to the plate, substantially as described.

JOHN H. BARNES. JGSEPH H. WOOLASTON. Witnesses:

WM. Scannen, FRED C. EARLE. 

